US4482658A - Process and apparatus for preparing aqueous dispersions of synthetic resins - Google Patents
Process and apparatus for preparing aqueous dispersions of synthetic resins Download PDFInfo
- Publication number
- US4482658A US4482658A US06/449,986 US44998682A US4482658A US 4482658 A US4482658 A US 4482658A US 44998682 A US44998682 A US 44998682A US 4482658 A US4482658 A US 4482658A
- Authority
- US
- United States
- Prior art keywords
- water
- synthetic resin
- milling means
- solutions
- milling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 46
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 46
- 239000006185 dispersion Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000007787 solid Substances 0.000 claims abstract description 15
- 238000001556 precipitation Methods 0.000 claims abstract description 14
- 239000002904 solvent Substances 0.000 claims abstract description 10
- 239000012736 aqueous medium Substances 0.000 claims abstract description 7
- 239000000049 pigment Substances 0.000 claims abstract description 5
- 239000000654 additive Substances 0.000 claims abstract description 4
- 238000003801 milling Methods 0.000 claims description 31
- 238000003756 stirring Methods 0.000 claims description 15
- 239000012065 filter cake Substances 0.000 claims description 6
- 230000001376 precipitating effect Effects 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 3
- 239000004606 Fillers/Extenders Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 8
- 238000013019 agitation Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 239000003960 organic solvent Substances 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 210000003298 dental enamel Anatomy 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 4
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- -1 superheated steam Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- JGFBRKRYDCGYKD-UHFFFAOYSA-N dibutyl(oxo)tin Chemical compound CCCC[Sn](=O)CCCC JGFBRKRYDCGYKD-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/14—Powdering or granulating by precipitation from solutions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/05—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media from solid polymers
Definitions
- the field of the invention is a process for preparing aqueous dispersions of synthetic resins and an apparatus for the production of these dispersions.
- the invention is particularly concerned with the preparation of aqueous synthetic resin dispersions by precipitating the synthetic resins from their solutions in water miscible solvents with water.
- the solutions may also contain pigments, fillers, and additives and the precipitation is simultaneously mechanically stressed by milling means, the precipitated solids are subsequently separated and uniformly distributed in an aqueous medium.
- the particle size distribution of the solid ingredients affects greatly the property profile of many liquid system properties, for instance the stability of sedimentation, applicability, flow properties during film formation and the properties of the deposited and hardened films, for instance the color intensity and the gloss. Accordingly, specific distributions of particle sizes are required for specific products and applications, where these distributions should be below 10 microns for primer surfacers, motor vehicle primers and automobile top coats.
- the particle sizes of synthetic resins in aqueous synthetic resin dispersions should also be of the same order of magnitude as the particle sizes of the pigments for these fields of application. This is not achieved however when synthetic resin solutions in organic solvents are atomized with gases, superheated steam, air or natural gas.
- the atomized products then are dried and the solid, solvent-free synthetic resin particles so obtained are dispersed in water to form a synthetic resin dispersion.
- the required particle sizes and a uniform distribution of grain sizes again are not achieved when a synthetic resin solution in organic solvents is distributed in water in an agitator, whereby the solid is precipitated. Again no good results are obtained when a synthetic resin solution in organic solvents is blown by means of jet nozzles into water, the solid being precipitated in this manner.
- aqueous synthetic resin dispersions by precipitating the synthetic resins with water from their solutions in water miscible solvents, which may also contain pigments, fillers and additives, while simultaneously mechanically stressing the dispersions with milling means, whereupon the precipitated solids are separated and uniformly distributed in an aqueous medium.
- the present invention is characterized in that the synthetic resins are precipitated in the presence of inert and moving milling means.
- the synthetic resin solution is added with stirring to a vessel holding water and milling means, the precipitation of the solids taking place in particularly fine form due to the action of the milling means, the precipitate together with the liquid being separated from the milling means, the precipitate being filtered or centrifuged, and the filter cake or the centrifuged residue being dispersed into an aqueous medium.
- Another embodiment of the invention provides continuous operation, using a continuously operating stirring mill.
- the stirring mill includes circulating water introduced directly before the intake of the stirring mill or else parallel with this intake into the synthetic resin solution.
- the precipitation takes place in the stirring mill within which remain the milling means while the precipitate together with the liquid is evacuated.
- the advantages of the present invention using the milling means is that substantially finer particles of synthetic resins can be obtained and a very rapid precipitation procedure is possible.
- the suitable milling means are inert and may consist of various materials. They are, for example, balls made of steel or glass, further of steatite, porcelain, flint, or also they are sand, such as Ottawa sand, for use in the stirring mills.
- FIG. 1 is a schematic representation showing the present invention using a container filled with the milling means
- FIG. 2 is a schematic representation showing the present invention using a stirring mill operating continuously.
- FIG. 1 shows an agitation vessel (1) provided with a stirrer (2) and containing milling means (3).
- Water (4) is present in the agitation vessel (1).
- the stirrer (2) is rotated about its vertical axis, whereby the milling means (3) and the water (4) are set into intensive motion.
- a synthetic resin solution (5) is supplied from above to the agitation vessel (1). Stirring proceeds for some time after the entire solution of the synthetic resin has been distributed through the vessel.
- the liquid mixture is allowed to drain through a sieve (6) mounted at the bottom of the vessel (1) and retaining the milling means (3) within the vessel, the water containing the solvent being separated by a pump (7) and a filter (8) from the synthetic resin particles.
- the filter cake so produced in the filter (8) can be washed with further water.
- the water humid filter cake is dispersed in a container (9) using water and possibly dispersants and protective colloids to form a synthetic resin dispersion.
- the mixture of water and solvent is fed through (10) to a solvent reprocessing apparatus.
- water (4) is placed in an agitator vessel (1) provided with a stirrer (2), said water being pumped by a pump (11) through a stirring mill (12) filled with milling means and then being fed back into the vessel (1).
- a solution of synthetic resin is metered at (13) into the above circulation.
- the liquid mixture is supplied from the agitation vessel (1) through a three-way valve (14) to the filter or to the centrifuge (8).
- the filter cake, or centrifuge residue, thereupon is dispersed with water into a synthetic resin dispersion.
- aqueous dispersions prepared in this manner contain synthetic resin particles of minute size which are very finely distributed and which upon deposition on a substrate and hardening are indistinguishable in their technical properties from coatings made from a synthetic resin solution.
- a solution is prepared from:
- a flow agent such as MODAFLOW (R) in a ball mill to form a fine particulate dispersion (Hegmann granularity: 5 to 10 microns).
- the precipitation was carried out according to the apparatus of FIG. 1 in a cooled agitated vessel holding 12 liters (of about 20 cm diameter) and provided with a paddle mixer rotating at 650 rpm.
- the temperature was kept at 30° C. during the precipitation procedure.
- the suspension so obtained was separated from the milling means using a sieve in front of the bottom valve of the agitation vessel. After the suspension was centrifuged, a centrifuged cake with a water content of 55% and a solvent content of less than 2% was obtained.
- the grain size was determined by microscopic measurement and found to be about 5 microns.
- processing viscosity was adjusted by adding about 15% of water, and a film was applied on a metal panel using a flow-cup gun and thereupon baked at 185° C. for 20 minutes, evincing good optical and weather-industrial properties.
- Example 1 An enamel according to Example 1, for which the proportion of diacetone alcohol is replaced by acetone, is precipitated in an apparatus according to FIG. 1 using steatite as the milling means, the temperature being 20° C. and the other conditions the same as in Example 1.
- the microscopically ascertained grain size was about 20 microns.
- the spray viscosity is adjusted by adding about 20% water and the substance is applied by a flow-cup gun, whereupon it is baked (20 minutes at 185°C.), resulting in a film with good optical and weather-industrial properties.
- An enamel with a Hegmann granular fineness of less than 5 microns was prepared in a stirring mill from:
- an agitated mill contains glass milling means of 1.5 mm diameter filling the 4-liter capacity to 75% and is crossed by a circulation of water with a rate of 100 liter/h; the enamel is supplied at about 30 liter/h by a pump to the circulating water at the intake of this agitated vessel.
- the quantitative ratios are so selected that after precipitation, the ratio of enamel to water is 1:5.
- the suspension so obtained is centrifuged to a water content of about 50% and to less than 1% of organic solvent.
- the spray viscosity is set by adding about 25% of water, and this substance is applied by a flow-cup gun; after baking at 15 minutes and 190° C., a film with good optical and weather-industrial properties is obtained.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Paints Or Removers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3037575 | 1980-10-04 | ||
| DE3037575A DE3037575C2 (de) | 1980-10-04 | 1980-10-04 | Verfahren zum Herstellen von wäßrigen Kunstharzdispersionen |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US06304008 Continuation | 1981-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US4482658A true US4482658A (en) | 1984-11-13 |
Family
ID=6113617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US06/449,986 Expired - Fee Related US4482658A (en) | 1980-10-04 | 1982-12-15 | Process and apparatus for preparing aqueous dispersions of synthetic resins |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4482658A (es) |
| EP (1) | EP0049787B1 (es) |
| JP (1) | JPS5794021A (es) |
| AT (2) | ATE7706T1 (es) |
| BR (1) | BR8106375A (es) |
| DE (2) | DE3037575C2 (es) |
| ES (1) | ES8207204A1 (es) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5856381A (en) * | 1996-04-29 | 1999-01-05 | Basf Aktiengesellschaft | Compounding of polymer dispersions |
| US20040220318A1 (en) * | 2003-04-29 | 2004-11-04 | Lepkowski Thaddeus J. | Method for creating microsphere polymers and particles |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2831840A (en) * | 1953-07-03 | 1958-04-22 | Shell Dev | Process for treating polymer coagulates |
| US2854426A (en) * | 1954-08-11 | 1958-09-30 | Dasher Rubber & Chemical Compa | Process of milling synthetic rubber latex coagulum containing water |
| US2977351A (en) * | 1956-06-28 | 1961-03-28 | Phillips Petroleum Co | Process for recovery of polyolefin by precipitation in water |
| US3090774A (en) * | 1963-05-21 | scoggin | ||
| US3432483A (en) * | 1965-02-18 | 1969-03-11 | Nat Distillers Chem Corp | Continuous process for preparing finely divided polymers |
| US3544540A (en) * | 1968-11-12 | 1970-12-01 | Phillips Petroleum Co | Temperature control system |
| US3862103A (en) * | 1971-10-27 | 1975-01-21 | Goodyear Tire & Rubber | Method of recovering polymer from its solution |
| US4202965A (en) * | 1977-09-26 | 1980-05-13 | Mitsubishi Gas Chemical Company, Inc. | Method for isolating solid polyarylene ester from its organic solvent solution |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE787544A (fr) * | 1971-08-14 | 1973-02-14 | Basf Ag | Procede de preparation de poudres de vernis pigmentees |
| GB1465601A (en) * | 1973-03-31 | 1977-02-23 | Basf Ag | Production of resins |
| DE2419330B2 (de) * | 1973-04-23 | 1975-02-20 | Union Carbide Corp., New York, N.Y. (V.St.A.) | Verfahren zur Herstellung von sprühbaren Uberzugspulvern feiner Teilchengröße |
| JPS5244053A (en) * | 1975-10-03 | 1977-04-06 | Mitsui Toatsu Chem Inc | Method for processing waste water containing synthetic amino resin |
| US4206161A (en) * | 1976-10-18 | 1980-06-03 | Dai Nippon Toryo Co., Ltd. | Method of producing resin powder |
| JPS54126335A (en) * | 1978-03-24 | 1979-10-01 | Kubota Ltd | Harvester |
| JPS5653755A (en) * | 1979-10-09 | 1981-05-13 | Mitsubishi Metal Corp | Pulverizing mixing machine |
-
1980
- 1980-10-04 DE DE3037575A patent/DE3037575C2/de not_active Expired
-
1981
- 1981-09-23 EP EP81107558A patent/EP0049787B1/de not_active Expired
- 1981-09-23 DE DE8181107558T patent/DE3163903D1/de not_active Expired
- 1981-09-23 AT AT81107558T patent/ATE7706T1/de not_active IP Right Cessation
- 1981-10-02 ES ES505998A patent/ES8207204A1/es not_active Expired
- 1981-10-02 AT AT0423581A patent/ATA423581A/de not_active Application Discontinuation
- 1981-10-02 BR BR8106375A patent/BR8106375A/pt unknown
- 1981-10-02 JP JP56156302A patent/JPS5794021A/ja active Pending
-
1982
- 1982-12-15 US US06/449,986 patent/US4482658A/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3090774A (en) * | 1963-05-21 | scoggin | ||
| US2831840A (en) * | 1953-07-03 | 1958-04-22 | Shell Dev | Process for treating polymer coagulates |
| US2854426A (en) * | 1954-08-11 | 1958-09-30 | Dasher Rubber & Chemical Compa | Process of milling synthetic rubber latex coagulum containing water |
| US2977351A (en) * | 1956-06-28 | 1961-03-28 | Phillips Petroleum Co | Process for recovery of polyolefin by precipitation in water |
| US3432483A (en) * | 1965-02-18 | 1969-03-11 | Nat Distillers Chem Corp | Continuous process for preparing finely divided polymers |
| US3544540A (en) * | 1968-11-12 | 1970-12-01 | Phillips Petroleum Co | Temperature control system |
| US3862103A (en) * | 1971-10-27 | 1975-01-21 | Goodyear Tire & Rubber | Method of recovering polymer from its solution |
| US4202965A (en) * | 1977-09-26 | 1980-05-13 | Mitsubishi Gas Chemical Company, Inc. | Method for isolating solid polyarylene ester from its organic solvent solution |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5856381A (en) * | 1996-04-29 | 1999-01-05 | Basf Aktiengesellschaft | Compounding of polymer dispersions |
| US20040220318A1 (en) * | 2003-04-29 | 2004-11-04 | Lepkowski Thaddeus J. | Method for creating microsphere polymers and particles |
| US7022747B2 (en) * | 2003-04-29 | 2006-04-04 | Basf Corporation | Method for creating microsphere polymers and particles |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3163903D1 (en) | 1984-07-05 |
| EP0049787A1 (de) | 1982-04-21 |
| EP0049787B1 (de) | 1984-05-30 |
| DE3037575A1 (de) | 1982-04-22 |
| ATA423581A (de) | 1985-03-15 |
| ES505998A0 (es) | 1982-09-01 |
| ATE7706T1 (de) | 1984-06-15 |
| BR8106375A (pt) | 1982-06-22 |
| ES8207204A1 (es) | 1982-09-01 |
| DE3037575C2 (de) | 1982-12-02 |
| JPS5794021A (en) | 1982-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3561003A (en) | Spray drying process | |
| US2581414A (en) | Process for dispersing pigments in film-forming materials | |
| US3674736A (en) | Process for the preparation of pigmented polymer powders of controlled particle shape and size and size distribution and product | |
| AU643191B2 (en) | Coloured powder coating compositions | |
| US5854311A (en) | Process and apparatus for the preparation of fine powders | |
| EP0372860B1 (en) | Coloured powder coating compositions | |
| JPH08231890A (ja) | 光沢のあるエマルジョンペイント | |
| US4332354A (en) | Process for preparing transparent iron oxide pigment dispersions | |
| US4936913A (en) | Aluminum flake pigment | |
| CZ389992A3 (en) | Process for preparing pulverized materials for the formation of heat-hardenable coatings and material for the formation of such coatings | |
| US5824144A (en) | Powder coating composition and method | |
| FI59608B (fi) | Foerfarande foer framstaellning av ett pulverformigt belaeggningsmaterial | |
| EP0459048A1 (en) | Coloured powder coating compositions | |
| US4226634A (en) | Process for preparing pigment compositions | |
| US4482658A (en) | Process and apparatus for preparing aqueous dispersions of synthetic resins | |
| US5981696A (en) | Process for preparing coating powder compositions and their use for making coatings | |
| JPH11343432A (ja) | 水性分散塗料の製造方法及び粉体塗料の製造方法 | |
| US4042560A (en) | Method of preparing homogeneous thermosetting powder paint compositions | |
| JPS60118754A (ja) | 顔料分散方法 | |
| US6677484B1 (en) | Melt-sprayed curing agent powder and powder coating compositions made therefrom | |
| US4028326A (en) | Process for producing powder paint particles from liquid paint I | |
| US4028327A (en) | Process for producing powder paint particles from liquid paint II | |
| CA1053086A (en) | Method of preparing powder particles by control of the particle shape | |
| US6241382B1 (en) | Method for producing powder lacquer containing gloss pigments | |
| US2722485A (en) | Method for producing coloring pigment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: BASF FARBEM + FASERN AKTIENGESELLSCHAFT AM NEUMARK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:VOCK, FRIEDRICH;LESSMEISTER, PETER;KIRCHNER, RALF;REEL/FRAME:004288/0014 Effective date: 19840718 Owner name: BASF FARBEM + FASERN AKTIENGESELLSCHAFT,GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:VOCK, FRIEDRICH;LESSMEISTER, PETER;KIRCHNER, RALF;REEL/FRAME:004288/0014 Effective date: 19840718 |
|
| FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
| AS | Assignment |
Owner name: BASF LACKE + FARBEN AKTIENGESELLSCHAFT Free format text: CHANGE OF NAME;ASSIGNOR:BASF FARBEN + FASERN AKTIENGESELLSCHAFT;REEL/FRAME:004595/0752 Effective date: 19860811 |
|
| FPAY | Fee payment |
Year of fee payment: 4 |
|
| FEPP | Fee payment procedure |
Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
| FPAY | Fee payment |
Year of fee payment: 8 |
|
| REMI | Maintenance fee reminder mailed | ||
| LAPS | Lapse for failure to pay maintenance fees | ||
| FP | Lapsed due to failure to pay maintenance fee |
Effective date: 19961113 |
|
| STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |